Hi,
I think Judgement of Verena can help you, since it will probably be a one-sided mass removal. But if you don't want to use empire cards, you can try to explore the rush orc menace from a different point of view. For example, cards like Durgnar the Bold, Grombrindal's Elite, Vengeful Slayer and the grudges punish your opponent for rushing you.
Another approach is to use cards that helps you to generate resources like Horn Hold Defender, Veteran Thunderers and Wealth of the Hold to help playing tactics in response to your opponents threats (and the eventual sinergy with cards like Karak Hirn Warrior).
Beleaguered Scout, Slayers of Karak Kadrin, Zhufbar Engineers and Veteran Quarreler are good defensive units.
I hope this could be of some help.